If you placed a sysidcfg file in the
compressed configuration file, you must specify the IP address of the server
that contains the file, as in the following example:

http://131.141.2.32/jumpstart/config.tar

If you saved the compressed configuration file on an HTTP
server that is behind a firewall, you must use a proxy specifier during boot.
You do not need to specify an IP address for the server that contains the
file. You must specify an IP address for the proxy server, as in the following
example:

http://www.shadow.com/jumpstart/
config.tar&proxy=131.141.6.151

ask – Specifies that the installation
program prompt you to type the location of the compressed configuration file.
The prompt happens after the system boots and connects to the network. If
you use this option, you are not able to do a completely hands off JumpStart
installation.

If you bypass the prompt by pressing Return, the
Solaris installation program interactively configures the network parameters.
The installation program then prompts you for the location of the compressed
configuration file.

options

dhcp – Specifies to use a DHCP server
to obtain network installation information that is needed to boot the system.
This option is not needed for a JumpStart installation. If you do not specify
to use a DHCP server by typing dhcp, the system uses the /etc/bootparams file or the naming service bootparams database.
For example, you would not specify dhcp if you wanted keep
a static IP address.